“The birth of our second son completes our family in a most precious and perfect way,” the couple told Hello!.

“It is difficult to fully express how we are feeling at this time; we are just overwhelmed with happiness and excitement.”

(Furnish and John with Zachary)

The British singer had previously spoken about his desire to expand their family, saying “I think it’s difficult to be an only child, and to be an only child of someone famous. I want Zachary to have a sibling.”

John, 65, and Furnish, 50, were married in 2005 after more than a decade together.